Take Paracetamol 650 mg for fever.
Need to diagnose the nature of infection.
Get dengue , Malaria, Typhoid test done. May require antibiotic depending on detailed history.
Fever of 102 degree is a matter of concern.
May be viral in origin also.
But need to check for common infections.
Take ample amount of water by mouth. Take ORS.
Next Steps
Consult doctor on practo for prescription